JPH0222073Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a contact material for sewage treatment used, for example, in a contact aeration type sewage septic tank.

Conventional technology Generally, this type of contact material is immersed in sewage water in a septic tank, and microorganisms that have grown on the surface of the contact material propagate, feeding on, oxidizing, decomposing, or assimilating pollutants in the sewage. This will purify the wastewater. Various contact materials have been known for use in such sewage treatment.

Problems to be Solved by the Invention However, conventional contact materials for sewage treatment are extremely bulky because they are all made of hard materials with a large number of water holes.
Such conventional contact materials are not only troublesome to handle when immersed in a septic tank, but also require a large amount of storage space before use, and when transported by truck, the loading capacity per truck is limited. There was a problem that transportation costs were very high because there were few.

Furthermore, if microorganisms proliferate too much on the surface of the contact material in the septic tank and the water holes of the contact material become clogged, the microorganisms can be forcibly removed by so-called backwashing, or the contact material can be removed from the septic tank. There was a problem in that it required cleaning, which was very troublesome.

By the way, a unit for a catalytic oxidation bed is already known in which a spiral cage-shaped cylinder is made from synthetic resin wire drawing, and the outer surface of the cylinder is covered with a synthetic fiber woven cloth. (See, for example, Japanese Utility Model Application Publication No. 100744/1983).

However, in such conventional catalytic oxidation bed units, the cage-shaped cylinder has a spiral shape as a whole;
Since they are non-foldable, they are also very bulky, and such conventional catalytic oxidation bed units are cumbersome to handle when immersed in a septic tank, and difficult to store and transport before use. There was also the problem that it required a lot of space.

The purpose of this invention is to solve the above-mentioned problems of the prior art, and because it is foldable, it is very easy to handle when immersed in a septic tank, and it also requires a lot of space when storing and transporting. To provide a contact material for sewage treatment, which can be easily removed by vibration even if microorganisms grow too much on the surface in a septic tank, making cleaning work very simple. be.

Means for Solving the Problems In order to achieve the above object, this invention has a water-permeable and bendable cylindrical contact body with reinforcing rings attached to both ends and the middle part at a predetermined interval. The gist is a contact material for sewage treatment, which is attached in parallel and has a suspension member attached to the uppermost reinforcing ring to be connected to a mounting frame.

Embodiment Next, an embodiment of this invention will be described in detail based on the drawings.

In FIGS. 1 to 4 showing the first embodiment of this invention, 1 is a contact aeration type sewage treatment septic tank, 2 is a number of contact materials immersed in the wastewater in the septic tank 1,
This consists of a cylindrical contact body 3 having a water passage hole 5 and made of a flexible synthetic resin net, and a plurality of cylindrical contact bodies 3 attached at predetermined intervals at both upper and lower ends and in the middle of the cylindrical contact body 3. It is constructed by a reinforcing ring 4.

Here, the cylindrical contact body 3 is specifically made of a synthetic resin net such as polyethylene, polypropylene, polyvinyl chloride, or nylon, but it is also made of woven fabric, nonwoven fabric, or other material having flexibility and corrosion resistance. It may be made of a material such as a perforated synthetic resin sheet.

Further, the reinforcing ring 4 is attached to maintain the shape of the cylindrical contact body 3, and is made of a material having rigidity and corrosion resistance, such as hard synthetic resin or non-rusting metal. . Although the means for connecting the cylindrical contact body 3 and the reinforcing ring 4 are not shown in the drawings, they may be connected by any suitable means such as, for example, fixing required portions of the reinforcing ring 4 with strings.

The contact material 2 usually has a diameter of 20 to 100 mm,
A water passageway 6 that opens upward and downward is formed inside it. The length of the contact material 2 is set appropriately depending on the depth of the septic tank 1.

As shown in FIG. 4, the contact material 2 can be folded freely by overlapping its reinforcing rings 4, and does not take up any bulk during storage and transportation.

Reference numeral 7 denotes a partition wall placed upright within the septic tank 1, which divides the inside of the septic tank 1 into a contact chamber 1a and an aeration chamber 1b. Reference numeral 8 denotes a grid-shaped upper and lower mounting beam horizontally attached to both the upper and lower ends of the partition wall 7 and the inner wall of the septic tank 1 in the contact chamber 1a;
A large number of the contact members 2 are attached to these mounting bars 8 in a suspended state by means of suspension strings 9. 10 is an aeration pipe arranged at the lower part of the aeration chamber 1b of the septic tank 1.

In the above, when air is supplied into the septic tank 1 from the aeration pipe 10, the aeration chamber 1 is
The sewage in b rises, the sewage in the contact chamber 1a descends, and the sewage circulates in the septic tank 1 around the partition wall 7. In the contact chamber 1a, the waste water passes through the water passages 6 and the mesh, that is, the water holes 5 of the contact material 2, or flows down along the outer surface of the contact material 2, so that pollutants in the waste water are absorbed by the contact material. 2. Contact with microorganisms attached to the surface, ingestion by the microorganisms,
The sewage is purified by oxidative decomposition or assimilation.

In addition, if microorganisms grow too much on the surface of the contact material 2 and the water passage holes 5 become clogged, the microorganisms can be easily dropped by applying vertical and horizontal vibrations to each contact material 2. be able to.

As shown in FIG. 5, the contact material 2 may be used in the form of a double tube, in which contact materials 2a and 2b having different diameters are fitted together. Contact material 2a, 2
The spacing between b's may be appropriately set in consideration of water permeability, but it is usually preferably 10 to 100 mm.

6 to 9 show various modifications of the contact material 2. FIG. First, the contact material 2c shown in FIG. 6 has two types of reinforcing rings 4, large and small, attached at predetermined intervals to a cylindrical contact body 3 made of a synthetic resin net. The passageway 6 in the contact material 2c is formed with wide and narrow parts alternately, and the cylindrical contact body 3 is similarly open and narrow, and its circumferential surface is designed to prevent the downward flow of sewage. This has the advantage that the sewage flows down across the water passage hole 5 of the cylindrical contact body 3, resulting in frequent contact between pollutants in the sewage and microorganisms. be.

The contact material 2d shown in FIG. 7 has reinforcing rings 4 whose diameters gradually increase from top to bottom attached to a cylindrical contact body 3 made of a synthetic resin net at predetermined intervals. A water passage 6 is formed within the contact material 2d, which gradually becomes wider downward. Further, the circumferential surface of the cylindrical contact body 3 is approximately conical and is disposed obliquely with respect to the downward flow of the waste water, so that the waste water flows downward across the water passage hole 5 of the cylindrical contact body 3.

Contrary to the case of FIG. 7, the contact member 2e in FIG. 8 has a reinforcing ring 4 attached to the cylindrical contact body 3 whose diameter decreases from top to bottom, so that the cylindrical contact body 3 is It is approximately in the shape of an inverted cone.

The contact material 2f shown in FIG. 9 has a square reinforcing ring 4 attached at predetermined intervals to a cylindrical contact body 3 made of a synthetic resin net, so that the contact material 2f has a rectangular tube shape. be.

It should be noted that the above-mentioned contact material 2 may be used not only one type at a time, but also a combination of two or more types. In particular, by using the two types of contact materials 2d and 2e shown in FIGS. 7 and 8 and arranging them alternately in the septic tank 1, the space inside the septic tank 1 can be used as effectively as possible. This has the advantage that wastewater can easily pass through the water passage holes 5 of the conical and inverted conical contact members 2d and 2e.

Further, the number of contact materials 2 immersed in the waste water in the septic tank 1 and the arrangement interval are arbitrary, and the contact materials 2
The mounting means are not limited to those shown, and any suitable mounting means may be adopted. It is sufficient that each contact member 2 has at least its upper end supported by the attachment means.

In the above example, the case where the contact material 2 of this invention is used for contact aeration type sewage treatment is shown, but the contact material 2 of this invention can also be used for other purposes such as sewage treatment using anaerobic microorganisms. It is.

Effects of the invention As mentioned above, the contact material for sewage treatment according to this invention has reinforcing rings arranged parallel to each other at predetermined intervals at both ends and the middle part of a cylindrical contact member that has water permeability and is flexible. Since the contact material for sewage treatment can be folded up by overlapping the reinforcing rings, it is very easy to handle when the contact material is immersed in the waste water in the septic tank. Further, the length of the contact material can be easily increased depending on the depth of the septic tank. In addition, since the suspension member to be connected to the mounting frame is attached to the uppermost reinforcing ring, the contact material can be placed inside the septic tank simply by hanging the suspension member from the mounting means. It is convenient for In addition, the volume of the contact material can be reduced by folding it, so less space is required for storage, and when transporting by truck, the loading capacity per truck can be greatly increased. The transportation costs are very low. Furthermore, even if microorganisms grow too much on the surface of the contact material in the septic tank and the water holes of the contact material become clogged, the contact material can be individually suspended in the septic tank by the hanging member. Therefore, vertical and horizontal vibrations can be easily applied to the contact material, microorganisms can be easily dropped, and the cleaning operation is extremely simple.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, and FIG. 1 is a schematic vertical cross-sectional view of a septic tank equipped with the product of the present invention according to the first embodiment, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIG.
The figure is a perspective view of the product of the present invention, Figure 4 is a perspective view of the product of the present invention in a folded state, Figure 5 is a perspective view of another example of the use of the product of the present invention, and Figures 6 to 9 are Fig. 6 shows various modifications of the product of this invention.
A perspective view of a modified example, FIG. 7 is a perspective view of a second modified example,
FIG. 8 is a perspective view of a third modification, and FIG. 9 is a perspective view of a fourth modification. 1... Septic tank, 2, 2a to 2f... Contact material, 3
... Cylindrical contact body, 4 ... Reinforcement ring, 5 ... Water passage hole, 6 ... Water passage, 8 ... Mounting bar (mounting means),
9... Hanging member.

Claims (1)

[Scope of utility model registration request] Reinforcement rings 4 are attached to both ends and the middle of a water-permeable and bendable cylindrical contact body 3 in parallel to each other at predetermined intervals, and the uppermost reinforcement ring 4 is connected to a mounting frame 8. A contact material for sewage treatment to which a hanging member 9 to be treated is attached.